avfilter: Document avfilter_graph_alloc return value

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

avfilter: Document avfilter_graph_alloc return value
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
cfe64613 · Federico Tomassetti · Luca Barbato · 27aa1ff3 · cfe64613
Commit cfe64613 authored Mar 21, 2015 by Federico Tomassetti Committed by Luca Barbato Mar 21, 2015
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avfilter.h libavfilter/avfilter.h +2 -0

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--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -1004,6 +1004,8 @@ typedef struct AVFilterGraph {

 /**
 * Allocate a filter graph.
+ *
+ * @return the allocated filter graph on success or NULL.
 */
 AVFilterGraph *avfilter_graph_alloc(void);